<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        #res{
            width: 200px;
            height: 200px;
            border:1px solid #ccc;
        }
    </style>
</head>
<body>
    <h2>敏感词过滤</h2>
    <p>
        <textarea name="" id="area" cols="30" rows="10"></textarea>
    </p>

    <p>
        <input type="submit" value="发布" id="input">
    </p>
    <p id="res"></p>

    <script>
        // 逻辑：用户输入的值，如果和正则匹配到了，则进行替换
        // 金三胖  妈的     使用*  替换
        let area = document.getElementById('area');
        let input = document.getElementById('input');
        let res = document.getElementById('res');
        let reg = /金三胖|妈的/g;
        input.onclick = function(){
            let newVue = area.value.replace(reg,'*');
            res.innerText = newVue;
        }
    
    </script>
</body>
</html>